Blue Number 1

Blue #1:Brilliant Blue FCF is described as the sodium salt. Blue one does not hold well in the body and therefore 90% is exerted through the feces... Uh, I think we all know what that means...

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Image url:http://upload.wikimedia.org/wikipedia/commons/a/a1/Brilliant_Blue_FCF.png
Information url:http://chemistryandphysics.astate.edu/draganjac/BlueFC.html